By Robert Catto

As cities grow, they evolve. But sometimes evolution is cyclical, it seems.

Sydney streets have been torn up before, many times, and for many reasons - this time, it's light rail, coming up the heart of the downtown and through the neighbourhood where I live; but it's not the first time trams have run through many of these streets. They're literally finding some of the old tracks when excavating to make the new ones.

It's just the first time in a generation or two; and, in the same way some people opposed the original trams and had them removed, some people are against the new ones coming back.